Main Article Content
In this work, activity of radioactive isotopes in some offshore seawater samples at vicinity areas of three islands has been investigated Phu Quy (Binh Thuan province), Phu Quoc (Kien Giang province), and Bach Long Vy (Hai Phong province). The ranges of radioactivity 226Ra, 238U, 137Cs, 90Sr, and 239,240Pu in seawater at three offshore islands are 2.09 ÷ 4.77 mBq/L, 2.33 ÷ 4.95 mBq/L, 0.98 ÷ 1.45 mBq/L, 1.22 ÷ 1.49 mBq/L, and 0.0045 ÷ 0.0066 mBq/L, respectively. These values show that the radioactivities of the above-mentioned radionuclides differ between monitoring periods and between three offshore islands of Vietnam, but which is equal to or lower than the corresponding value according to others seas in Vietnam and Asia – Pacific. The correlation between radioisotopes and properties of seawater (pH, conductance, and salinity) is also shown in this study to assess their impact on the fluctuations of the above radinuclides.
Radioactivity in seawater, monitoring, offshore island
. Director-General of IAEA, “The Fukushima Daiichi Accident”,
. McAulay, I.R., and Moran, “D., Radiocaesium fallout in Ireland from the Chernobyl accident”, Journal of Radiological Protection, Vol.9, (1), p. 29-32, 1989.
. IAEA, The Database on Nuclear Power Reactors China Generated by the Power Reactor Information System (PRIS) Database, IAEA, Vienna, Austria, 2020,
. Phu Quy island district’s website, https://phuquy.binhthuan.gov.vn/1355/34286/65180/gioi-thieu-chung.
. Phu Quoc island district’s website, https://phuquoc.kiengiang.gov.vn/trang/gioithieu.aspx.
. Laboratory of Environment Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-NN-13:2017.
. Laboratory of Environment Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-NB-16:2017.
. Laboratory of Environment Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-N-24:2017.
. Laboratory of Environment Analyses (VILAS 525), Center for Environment Research and Monitoring, Nuclear Research Institute, TCCS-NB-26:2014.
. V.Harms, I.Osvath, and D. Osborn, IAEA-RML-2018-01 Proﬁciency Test for Determination of Radionuclides in Sea-water, International Atomic Energy Agency, Vienna, Austria, 2019.
. Nguyen Trong Ngo, Le Xuan Thang., et al, “Acrylic fibers coated with copper hexacyanoferrate to determine 137Cs activity in coastal seawater of Vietnam”, Journal of Radioanalytical and Nuclear Chemistry, https://doi.org/10.1007/s10967-020-07374-4.
. Station of Chemical and Radioactive Environment Monitoring and Analysis No. 3, Nuclear Research Institute, Report on the implementation of Annually National Projects: Radioactive environmental monitoring and analysis in Ninh Thuan province; Ganh Rai in Ba Ria Vung Tau province; Phu Quy in Binh Thuan province and Phu Quoc in Kien Giang province.
. Trong-NgoNguyen, Quang-ThienTran., et al, “Activity Concentrations of Sr-90 and Cs-137 in Seawater and Sediment in the Gulf of Tonkin,Vietnam”, Hindawi, Journal of Chemistry, Volume 2020, Article ID 8752606, 8 pages,
. IAEA/RCA/UNDP Project, Asia-Pacific marine radioactivity database (ASPAMARD), https://aspamard.pnri.dost.gov.ph/home, 2018.
. Circular No. 17/2011/TT-BYT “Promulgating regulations on limits of radioactive contamination in food, Ministry of Health, Hanoi, May 17, 2011.
. Circular No. 43/2015/TT-BTNMT dated September 29, 2015, issued by the Minister of Natural Resources and Environment on "Report of environmental status, set of environmental indicators and management of environmental monitoring data".